<!DOCTYPE HTML>
<html>
    <head>
        <meta charset="utf8">
        <title>background</title>
        <style>
            *{
                color: white;
            }
            body {
                background-color: cornflowerblue;
            }
        </style>
    </head>
    <body>
         <h1>背景色为: cornflowerblue</h1>
    </body>
</html>